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From Wikipedia

Marine ecosystem

Marine ecosystems are among the largest of Earth's aquatic ecosystems. They include oceans, salt marsh and intertidal ecology, estuaries and lagoons, mangroves and coral reefs, the deep sea and the sea floor. They can be contrasted with freshwater ecosystems, which have a lower salt content. Marine waters cover two-thirds of the surface of the Earth. Such places are considered ecosystems because the plant life supports the animal life and vice-versa. See food chains.

Marine ecosystems are very important for the overall health of both marine and terrestrial environments. According to the World Resource Center, coastal habitats alone account for approximately 1/3 of all marine biological productivity, and estuarine ecosystems (i.e., salt marshes, seagrasses, mangrove forests) are among the most productive regions on the planet. In addition, other marine ecosystems such as coral reefs, provide food and shelter to the highest levels of marine diversity in the world.

From Yahoo Answers

Question:I have to do a project for school on biomes and am having trouble finding the food chain of prairie grassland biomes. Can anyone help me out?

Answers:grass- grasshoper, grasshoper - frog , frog-snake,snake-eagle eagle-bacteria all humaus by the action of bacteria

Question:Describe what you think would happen if one of the organisms were removed.

Answers:Nitrogen in soil leaches into water + CO2 in air-Algae-minnows-small fish-larger fish-mammals (bears)-nitrogen in soil + CO2 in air. If one organism is removed, the chain will fail.

Question:1 Which refers to decomposers? A They make their own food. B They absorb nutrients from dead animals. C They eat dead animals. D They live inside the body of living organisms. 2 Which is a scavenger? A Eagle B Hawk C Falcon D Vulture 3 Give a process that results in loss of energy at each trophic level. 4 A diagram that shows the amount of energy at each trophic level is an _____________ ? 5 A diagram that shows feeding relationships in an ecosystem is a _____________ ? 20 minutes ago

Answers:1. it is B. Decomposers are bacteria and stuff that absorb the nutrients from dead animals. 2. Vulture. 3. idk, I think it's decomposing >_< 4. Its a Food Chain 5. Its a Food Web.

Question:I am having problems doing a diagram on one type of food chain operative within the park. I have to use specific organisms as an example of the different trophic levels. The animals I found were a squirrel,bees,flies,butterfly,dog,worms,ants and birds. Surrounding it was trees, leaves, flowers.

Answers:I'm not entirely sure what you're asking here. A food chain is just a line showing what's eaten by what (or, to be more precise, the transfer of energy through ecosystems). It starts with the producer (often a plant), then has an arrow pointing to whatever eats that (the primary consumer, generally an animal). That in turn will have an arrow pointing to whatever eats that (the secondary consumer), and so on. Each organism is a trophic level.

From Youtube

The food chain :The grassland ecosystem and the food chain.

Interaction In Ecosystem :Check us out at www.tutorvista.com An ECOSYSTEM consists of the non-living (or abiotic) environment (rocks, soil, water, climate) and the populations of living organisms that reside in that environment. Let us look at how we organize the interactions between living organisms in an ecosystem. First of all, consider what living organisms need in order to live. Some of the things they need are food, water, oxygen and a method to remove waste products. Water and oxygen can be obtained from the abiotic environment and waste products can be expelled into the environment. An organism needs to obtain food to convert into energy, and the energy is used in life processes, such as breathing, moving, maintaining organs and reproducing. So an organism needs to eat food; that same organism could be eaten by another bigger organism. This "who eats whom" can be organized into what is called a FOOD CHAIN. Here is an example of a FOOD CHAIN: algae -- krill -- codfish -- leopard seal -- killer whale